CSPIKE10 is a modification for Quake made by Charlie Zimmerman. This changes the properties of Nails, fired from the Nailgun/Super Nailgun or from a Nail Trap, to be visible after they hit a wall. Some won't properly stick to the wall and instead will bounce, possibly injuring nearby entities. After a short period of time, the Nails shall disappear.
Furthermore, this modification also makes it so that Grenade Launcher grenades will also release some Nails upon exploding.
This modification was later included in ZWIND2.